Czasopismo
2008
|
Vol. 31, nr 2
|
341-347
Tytuł artykułu
Autorzy
Wybrane pełne teksty z tego czasopisma
Warianty tytułu
Języki publikacji
Abstrakty
Purpose: The mechanical properties of the syntactic polymer foams at the intermediate and high strain rates were not understood comprehensively. Then, this study characterizes the tensile mechanical properties of the polymer syntactic composites at high strain rates. Design/methodology/approach: Eight kinds of syntactic foams and one neat PP/SEBS specimens are prepared at the same manufacturing process: 0, 2, 4, 8, 10, 20, 30, 40 and 50 volume percents of microballoons in the PP/SEBS blend matrix. Tensile tests are conducted at strain rates ranged from 0.3 to 100 s-1. Apparent elastic modulus, yield stress and rupture strain are measured and the effects of microballoons on the mechanical properties are studied. In addition, the experimental results are compared with analytical model for closed-cell foam and the effects of the density of the PP/SEBS/microballoon composite on both apparent elastic modulus and yield stress are discussed. Findings: The apparent elastic moduli of PP/SEBS/microballoon syntactic composites follow the Gibson-Ashby law at the nominal strain rate of 100 s-1. The yield stress of PP/SEBS/microballoon syntactic composites follow the simple rule of mixture at the relative densities larger than 0.9. The material ductility decreases drastically once the microballoons are blended in the matrix material. Research limitations/implications: The influence of the local strain rate caused by the heterogeneous microstructure on the mechanical properties is to be further explored. Practical implications: In the automobile applications, the thermoplastic polymer syntactic foams are believed to have many advantages because the usual commercial extruders or injection moulding machines are applicable for producing them, leading to the more light-weight polymeric components. Originality/value: The present study investigates the effects of the strain rate and density on the tensile mechanical properties comprehensively in the polymer syntactic foams.
Słowa kluczowe
Rocznik
Tom
Strony
341-347
Opis fizyczny
Biblogr. 15 poz., wykr.
Twórcy
autor
- Honda R&D Co., Ltd., 4630 Shimotakanezawa, Haga-machi, Haga-gun,Tochigi 321-3393, Japan, hiroyuki_mae@n.t.rd.honda.co.jp
Bibliografia
- [1] A. E. Medhat, V. T. Hareesh, Dynamic fracture parameters and constraint effects in functionally graded syntactic epoxy foams, International Journal of Solids and Structures 40 (2003) 1885-1906.
- [2] F. A. Shutov, Syntactic polymer foams, Advanced in Polymer Science 73/74 (1986) 63-123.
- [3] E. Lawrence, R. Pyrz, Viscoelastic properties of polyethylene syntactic foam with polymer microballoons, Polymers and Polymer Composites 9 (2001) 227-238.
- [4] L. Whinnery, S. Goods, B. Even, Expancel foams: fabrication and characterization of a new reduced density cellular material for structural applications, Sandia Report 30 (2000) 2000-8217.
- [5] M. C. Saha, H. Mahfuz, U. K. Chakravarty, M. Uddin, Md. E. Kabir, S. Jeelani, Effect of density, microstructure, and strain rate on compression behavior of polymeric foams, Materials Science and Engineering A 406 (2005) 328-336.
- [6] G. Subhash, Q. Liu, X. L. Gao, Quasistatic and high strain rate uniaxial compressive response of polymeric structural foams, International Journal of Impact Engineering 32 (2006) 1113-1126.
- [7] S. Ouellet, D. Cronin, M. Worswick, Compressive response of polymeric foams under quasi-static, Medium and High Strain Rate Conditions, Polymer Testing 25 (2006) 731-743.
- [8] H. Mae, M. Omiya, K. Kishimoto, Effects of strain rate and density on tensile behavior of polypropylene syntactic foam with polymer microballoons, Materials Science and Engineering A 477 (2008) 168-179.
- [9] H. Mae, M. Omiya, K. Kishimoto, Tensile behavior of polypropylene blended with bimodal distribution of styreneethylene-butadiene-styrene particle size, Journal of Applied Polymer Science 107 (2008) 3520-3528.
- [10] H. Mae, M. Omiya, K. Kishimoto, Effect of total rubber content on ductility of polypropylene blended with bimodal distribution of styrene-ethylene-butadiene-styrene particle size, Journal of Materials Science Japan (2008), in press.
- [11] H. Mae, M. Omiya, K. Kishimoto, Material ductility and toughening mechanism of polypropylene blended with bimodal distributed particle size of styrene-ethylenebutadiene-styrene tri-block copolymer at high strain rate, Journal of Applied Polymer Science (2008), in press.
- [12] H. Mae, M. Omiya, K. Kishimoto, Effect of micro porous shape on mechanical properties in polypropylene syntactic foams, Journal of Solid Mechanics and Materials Engineering 2 (2008), in press.
- [13] H. Mae, M. Omiya, K. Kishimoto, Effects of strain rate and relaxation rate on elastic modulus of semi-crystalline polymer, Transaction of the Japan Society for Computational Methods in Engineering 7 (2008) 207-212.
- [14] L. J. Gibson, M. F. Ashby, Cellular Solids, Structures and Properties, 2nd Edition, Cambridge University Press, 1999, 210.
- [15] V. Kumar, M. Van der Wel, K. A. Seeler, Experimental characterization of the tensile behavior of microcellular polycarbonate foams, Journal of Engineering Materials and Technology 116 (1994) 439-445.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.baztech-article-BWAW-0002-0025